Add issue hierarchy metadata

packages/linear-core/src/entities/linear-gateway.ts

@@ -129,6 +129,8 @@ async function toIssue(record: SdkIssueLike): Promise<IssueRecord> {
       ),
     ]);
 
+  const childrenCount = children.length;
+
   return {
     id: record.id,
     number: record.number,
@@ -153,10 +155,13 @@ async function toIssue(record: SdkIssueLike): Promise<IssueRecord> {
     milestoneName: milestone?.name,
     parentId: record.parentId ?? undefined,
     parentIdentifier: parent?.identifier,
+    parentTitle: parent?.title,
     labelNames: labels
       .map((label) => label.name)
       .filter((value): value is string => typeof value === "string"),
-    childCount: children.length,
+    childCount: childrenCount,
+    childrenCount,
+    hasChildren: childrenCount > 0,
     relationCount: relations.length,
     url: record.url,
     createdAt: toDateString(record.createdAt),

packages/linear-core/src/entities/models.ts

@@ -22,8 +22,11 @@ export interface IssueRecord {
   readonly milestoneName?: string;
   readonly parentId?: string;
   readonly parentIdentifier?: string;
+  readonly parentTitle?: string;
   readonly labelNames?: readonly string[];
   readonly childCount?: number;
+  readonly childrenCount?: number;
+  readonly hasChildren?: boolean;
   readonly relationCount?: number;
   readonly url: string;
   readonly createdAt: string;

packages/linear-core/tests/v2-gateway.test.ts

@@ -358,8 +358,11 @@ describe("LinearGateway v2", () => {
     expect(issue.teamKey).toBe("ENG");
     expect(issue.milestoneName).toBe("Beta");
     expect(issue.parentIdentifier).toBe("ENG-0");
+    expect(issue.parentTitle).toBe("Parent issue");
     expect(issue.labelNames).toEqual(["Bug"]);
     expect(issue.childCount).toBe(1);
+    expect(issue.childrenCount).toBe(1);
+    expect(issue.hasChildren).toBe(true);
     expect(issue.relationCount).toBe(1);
     expect(issue.estimate).toBe(3);
     expect(issue.dueDate).toBe("2026-04-01");